Seller financing won't happen for anyone

So I was talking to a broker that owns a property listed on the MLS in Mesa, Az.

I was conversing with him to learn his how and why in investing.

I later introduced seller financing as my go to option for obtaining a deal with him, and he laughs at it saying, ''no one in this world would seller finance a property that cash flows. And if they do, run!''

Is he somewhat right and I am senile, or is he in some other dimension?